Osram - GEC Osglim neon lamp for Wavemeters

Another more unusual lamp found in the large lot. This is a rare lamp, intended for use in old pieces of equipment called a wavemeter (for more info see here: http://lampes-et-tubes.info/dlgl/dl198.php?l=e) I'm very glad to have found this rare specimen totally by chance, I didn't even know it was included in the lot and only found it once it arrived. I have not managed to test this as it might not have an internal resistor.